| 摘要 |
PROBLEM TO BE SOLVED: To provide a leg part of a ladder, which prevents a slip of feet of the ladder and the backward/sideways fall of the ladder. SOLUTION: A structure of the leg part of the ladder is taken as a double structure composed of a base plate and a surface brought into contact with ground, so as to enable replacement of only the surface brought into contact with the ground. Accordingly, a leg adapted to a ground condition can be easily mounted. Additionally, the invention of a folding large-scale leg, which is easily mountable, completely prevents the fall of the ladder.
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